Bug 213615

Summary: Native display black after kernel update from 5.11 --> 5.12. External monitor works fine.
Product: Drivers Reporter: ilia.volkov
Component: Video(AGP)Assignee: Jean Delvare (jdelvare)
Status: NEW ---    
Severity: high    
Priority: P1    
Hardware: Intel   
OS: Linux   
Kernel Version: 5.12.12 Subsystem:
Regression: No Bisected commit-id:

Description ilia.volkov 2021-06-29 07:47:05 UTC
After update kernel from 5.11 --> 5.12 native display on thinkpad t440p is black. Downgrade to 5.11 fix it. Xrandr detect native monitor as normal. Screen turns black after GRUB loaded, in elogin screen. 

Specs:

CPU: Intel i7-4700MQ (8) @ 3.400GHz
GPU: Intel 4th Gen Core Processor

Drivers:

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
        Subsystem: Lenovo ThinkPad T440p
        Kernel driver in use: i915
        Kernel modules: i915